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Reverse rotation oil control |
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Waterdog 
Grand Poobah 
Joined: April-27-2006 Location: United States Status: Offline Points: 2020 |
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 Topic: Reverse rotation oil controlPosted: January-08-2008 at 9:56pm |
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351w - I'm looking for a block ,is the crank groved for the rear main seal or the seal directional? Is there a one peice r/main seal for newer blocks(reverse rotation)? The short block is still in the boat but not for long!
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87BFN owner
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Joined: August-25-2006 Location: Saline, MI Status: Offline Points: 2194 |
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Posted: January-08-2008 at 10:22pm |
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boat dr
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Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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Posted: January-08-2008 at 10:24pm |
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Andy, depends on the year model.
The two piece rear main uses knurlings on the crank to control the oil. The one piece uses a special seal that has the knurlings made into the seal.This type uses a "normal"crankshaft. Kinda like the front seal that you have now.The piston pins do not have an offset so they do not have to be rotated.All you have to have is a Reverse Rotation camshaft. Now is the time to build that stroker motor. there is rumors that a 351/427 stroker will be at GREEN LAKE.........Food for thought............boat dr |
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Waterdog
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Joined: April-27-2006 Location: United States Status: Offline Points: 2020 |
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Posted: January-08-2008 at 11:03pm |
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The boat is a 86 Silver the block s/n is a 84 casting ,heads 85. It has 270 hrs. I found a 74 block out of a truck. The mustang guys say 69-74 blocks weigh 10 lbs. more dew to more meat in the web area. I'd like to use the old reciprocating assy. with new bearings & rings D/roller T set, GT40 or P heads a new cam , al weiand intake. ReidP had a builder out of Michigan but I lost that web site anybody have it ? I'll be in Detroit for the Autorama maybe I could drop by(and pick up a short block!)
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Sabre002
Groupie 
Joined: July-18-2007 Location: United States Status: Offline Points: 53 |
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Posted: January-09-2008 at 8:46pm |
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Yes some cranks have a goove cut inthem to help push oil back into the motor. Reid and I found this out the hard way when we changed a motor to standard rotaion to put in a Donzi.
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So what winks and f**k's like a tiger?
www.facebook.com/sabre002 |
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reidp
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Joined: December-06-2003 Location: Mooresville, NC Status: Offline Points: 1804 |
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Posted: January-11-2008 at 9:31pm |
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Now why would he go and admit that on this website. I filed it under the "what the hell was I thinking" category, and am trying to forget about it.
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eric lavine
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Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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Posted: January-12-2008 at 12:18am |
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you did what?????!!!!!!!!! I'll never forget
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"the things you own will start to own you"
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eric lavine
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Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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Posted: January-13-2008 at 1:07pm |
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Did you guys make sure you put the flywheel towards the back (aft) of the boat?
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"the things you own will start to own you"
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eric lavine
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Posted: January-13-2008 at 1:43pm |
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Dont worry Reid, i put a trans back up into a truck a couple weeks ago and between phone calls i found a very important thrustwasher in my hot tank after the fact, i have no idea how i forgot it because i do many of these just from memory.... had to pull it back out
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"the things you own will start to own you"
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reidp
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Joined: December-06-2003 Location: Mooresville, NC Status: Offline Points: 1804 |
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Posted: January-14-2008 at 2:13am |
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I feel your pain Eric. I had this stout 302 short block from an older CC Mustang just sitting on a stand when a buddy and I picked up this neat old red '67 Donzi 18' with a busted engine. I was in such a hurry to see this thing run that we immediately swapped a std rot cam into the 302 and installed the engine and almost immediately started draining oil out of the bilge. But it did run good as several CCFans witnessed, but we picked up a std rot 347 stroker late summer and we've been running with that since, and which doesn't leak oil. But I KNEW that Rev Rot 302 would leak when spun std, esp without changing anything oil related. |
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eric lavine
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Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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Posted: January-15-2008 at 11:49pm |
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ya know something Reid... i finished a tranny just today, rebuilt and tested it and wouldnt you know it, one of the guys found the baffle sitting on the bench next to the one i was on. I completely forgot it and again i had to tear it back down...i guess it being winter i fell out of the groove
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"the things you own will start to own you"
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Gary S
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Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Posted: January-16-2008 at 1:36am |
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When I did mine,the machine shop ground off the grooves and put on a speedy sleeve to build it back up.I then used a rope seal and it's worked fine since.
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81nautique
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Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5787 |
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Posted: January-16-2008 at 9:56am |
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When I rebuilt my 351 RR the crank had the oil groves in it. The machinist said I could use any rear seal since the shaft was groved. I did get a set of RR seals anyway just to be sure. Don't forget about the front seal, that one must be RR as there are no groves.
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You can’t change the wind but you can adjust your sails
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